Thiamine transporter 2

SLC19A3
Identifiers
Aliases	SLC19A3, BBGD, THMD2, THTR2, solute carrier family 19 member 3, thTr-2
External IDs	OMIM: 606152; MGI: 1931307; HomoloGene: 23530; GeneCards: SLC19A3; OMA:SLC19A3 - orthologs
Gene location (Human)
Chr.	Chromosome 2 (human)
End	227,718,028 bp
Gene location (Mouse)
Chr.	Chromosome 1 (mouse)
End	83,016,169 bp
RNA expression pattern
	Top expressed in
	subcutaneous adipose tissue; ; abdominal fat; ; placenta; ; right lung; ; right lobe of liver; ; jejunal mucosa; ; gallbladder; ; duodenum; ; epithelium of colon; ; testicle;
	Top expressed in
	duodenum; ; right kidney; ; proximal tubule; ; morula; ; lumbar subsegment of spinal cord; ; human kidney; ; epithelium of lens; ; embryo; ; embryo; ; visual cortex;
	More reference expression data
	n/a
Gene ontology
Molecular function	thiamine transmembrane transporter activity; vitamin transmembrane transporter activity;
Cellular component	integral component of membrane; plasma membrane; membrane;
Biological process	thiamine-containing compound metabolic process; thiamine transport; thiamine transmembrane transport; vitamin transport; transmembrane transport;
	Sources:Amigo / QuickGO
Orthologs
	80704
	80721
	ENSG00000135917
	ENSMUSG00000038496
	Q9BZV2
	Q99PL8
	NM_025243; NM_001371411; NM_001371412; NM_001371413; NM_001371414
	NM_030556
	NP_079519; NP_001358340; NP_001358341; NP_001358342; NP_001358343
	NP_085033
	Wikidata
View/Edit Human	View/Edit Mouse

Thiamine transporter 2 (ThTr-2), also known as solute carrier family 19 member 3, is a protein that in humans is encoded by the SLC19A3 gene.^[5]^[6]^[7] SLC19A3 is a thiamine transporter.

Function

ThTr-2 is a ubiquitously expressed transmembrane thiamine transporter that lacks folate transport activity.^[5]

It is specifically inhibited by chloroquine.^[8]

Clinical significance

Mutations in this gene cause biotin-responsive basal ganglia disease (BBGD); a recessive disorder manifested in childhood that progresses to chronic encephalopathy, dystonia, quadriparesis, and death if untreated. Patients with BBGD have bilateral necrosis in the head of the caudate nucleus and in the putamen. Administration of high doses of biotin in the early progression of the disorder eliminates pathological symptoms while delayed treatment results in residual paraparesis, mild mental retardation, or dystonia. Administration of thiamine is ineffective in the treatment of this disorder. Experiments have failed to show that this protein can transport biotin. Mutations in this gene also cause a Wernicke's-like encephalopathy.^[5]

References

^ ^a ^b ^c GRCh38: Ensembl release 89: ENSG00000135917 – Ensembl, May 2017
^ ^a ^b ^c GRCm38: Ensembl release 89: ENSMUSG00000038496 – Ensembl, May 2017
^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ ^a ^b ^c "Entrez Gene: solute carrier family 19".
^ Eudy JD, Spiegelstein O, Barber RC, Wlodarczyk BJ, Talbot J, Finnell RH (December 2000). "Identification and characterization of the human and mouse SLC19A3 gene: a novel member of the reduced folate family of micronutrient transporter genes". Mol. Genet. Metab. 71 (4): 581–90. doi:10.1006/mgme.2000.3112. PMID 11136550.
^ Zeng WQ, Al-Yamani E, Acierno JS, Slaugenhaupt S, Gillis T, MacDonald ME, Ozand PT, Gusella JF (July 2005). "Biotin-responsive basal ganglia disease maps to 2q36.3 and is due to mutations in SLC19A3". Am. J. Hum. Genet. 77 (1): 16–26. doi:10.1086/431216. PMC 1226189. PMID 15871139.
^ Huang Z, Srinivasan S, Zhang J, Chen K, Li Y, Li W, Quiocho FA, Pan X (2012). "Discovering thiamine transporters as targets of chloroquine using a novel functional genomics strategy". PLOS Genet. 8 (11): e1003083. doi:10.1371/journal.pgen.1003083. PMC 3510038. PMID 23209439.

External links

SLC19A3+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

This membrane protein–related article is a stub. You can help Wikipedia by expanding it.

[refGRCh38Ensembl-1] GRCh38: Ensembl release 89: ENSG00000135917 – Ensembl, May 2017

[refGRCm38Ensembl-2] GRCm38: Ensembl release 89: ENSMUSG00000038496 – Ensembl, May 2017

[3] "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.

[4] "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.

[entrez-5] "Entrez Gene: solute carrier family 19".

[pmid11136550-6] Eudy JD, Spiegelstein O, Barber RC, Wlodarczyk BJ, Talbot J, Finnell RH (December 2000). "Identification and characterization of the human and mouse SLC19A3 gene: a novel member of the reduced folate family of micronutrient transporter genes". Mol. Genet. Metab. 71 (4): 581–90. doi:10.1006/mgme.2000.3112. PMID 11136550.

[pmid15871139-7] Zeng WQ, Al-Yamani E, Acierno JS, Slaugenhaupt S, Gillis T, MacDonald ME, Ozand PT, Gusella JF (July 2005). "Biotin-responsive basal ganglia disease maps to 2q36.3 and is due to mutations in SLC19A3". Am. J. Hum. Genet. 77 (1): 16–26. doi:10.1086/431216. PMC 1226189. PMID 15871139.

[pmid23209439-8] Huang Z, Srinivasan S, Zhang J, Chen K, Li Y, Li W, Quiocho FA, Pan X (2012). "Discovering thiamine transporters as targets of chloroquine using a novel functional genomics strategy". PLOS Genet. 8 (11): e1003083. doi:10.1371/journal.pgen.1003083. PMC 3510038. PMID 23209439.

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Function

Clinical significance

References

Further reading

External links